Protective mask



FIG. 1 is a front and left-side perspective view of a protective maskshowing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side being amirror image;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

All broken-lines appearing in the drawings form no part of the claimeddesign.

CLAIM The ornamental design for a protective mask, as shown anddescribed.